Abstract:
Proper dissipation of thermal energy has always been a need for desirable efficiency of a
system. Extended surface aids in releasing the heat to the immediate surrounding by
inducing an extra area. This particular work assesses thermal and fluid flow behavior of
extended surfaces with circular and elliptic shaped cross section. Extended surfaces of
unvaried cross section are mounted over a square plate arrayed in a staggered manner.
With the aid of different thermofluidic parameters, the elliptic shaped pin fin is established to provide a higher thermal performance enhancement of nearly 15% over cylindrical pin fin at inlet flow velocity of 2.35 m/s. Further, for elevating the interaction
between the surface of the fin and the fluid, elliptic fins are reoriented to form a split. In
contrast to cylindrical shaped fin, modification using split shows better result with the
highest heat transfer increment of nearly 25%. Further, in order to maximize Nusselt
number (Nu), a single objective cuckoo search optimization analysis is done by adopting
the response surface method. After analyzing the optimization, it is found that the maximum value of Nu is obtained at dimensionless transverse offset (TO*) ¼ 0.125 and dimensionless longitudinal offset (LO*) ¼ 0, which has been further validated with the
numerical result within 0.97% accuracy. Further, for the cylindrical fin, the present simulations agree with the available empirical correlation within 6.22% accuracy
